You’ve made it to the end! Let’s review what we have learned so far:

• Printing output in a Java program can be done using the following three commands: System.out.print(), System.out.println(), and System.out.printf()
• The Scanner class is built into Java and is useful for reading input from different sources including user input, and text files.
• FileWriter is used to output data from a program into a file on your computer, and FileReader is used to read from a file. They both are specifically tailored to reading and writing character/text data to files.
• IOExceptions are exceptions related to input or output that a program may encounter. They can be handled by a programmer using try-catch blocks.
• Java programs must initially be compiled into Java byte code before they can be run using a terminal or command prompt. When running a Java program, a user can pass in multiple arguments through the command line.